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    HIGH-STRENGTH CONJUGATED FIBER
    83.
    发明专利
    HIGH-STRENGTH CONJUGATED FIBER 失效

    公开(公告)号：JP2002317334A

    公开(公告)日：2002-10-31

    申请号：JP2001123079

    申请日：2001-04-20

    Applicant: TORAY INDUSTRIES

    Inventor： SHIBATA TSUYOSHI ,  KANNO KOJI ,  FUKUHARA MOTOTADA

    IPC: D01F8/14

    Abstract: PROBLEM TO BE SOLVED: To remarkably improve disadvantages possessed by a high-strength and high-modulus fiber composed of a molten liquid crystal-forming polyester in that the high-strength and high-modulus fiber is readily fibrillated by friction and the fatigue resistance is low, etc., and supply a fiber having excellent operating performances. SOLUTION: In this high-strength conjugated fiber a core component is composed of a molten liquid crystal-forming polyester and a sheath component is composed of >=80 mol% of polycyclohexanedimethanol terephthalate in (90/10) to (50/50) conjugated ratio of the fiber.

    PARTIALLY ORIENTATED UNDRAWN YARN OF POLYESTER AND METHOD FOR PRODUCING THE SAME
    84.
    发明专利
    PARTIALLY ORIENTATED UNDRAWN YARN OF POLYESTER AND METHOD FOR PRODUCING THE SAME 失效

    公开(公告)号：JP2001214331A

    公开(公告)日：2001-08-07

    申请号：JP2000025448

    申请日：2000-02-02

    Applicant: TORAY INDUSTRIES

    Inventor： MIYAZONO KOKI ,  FUNATSU YOSHIJI ,  FUKUHARA MOTOTADA

    IPC: D01F6/86

    Abstract: PROBLEM TO BE SOLVED: To obtain a partially oriented undrawn yarn of polyester having suppressed orientation in spinning and improved spinnability and drawing ratio. SOLUTION: This partially oriented undrawn yarn of polyester comprises a copolyester which is copolymerized with a polyalkylene glycol and satisfies (1) the number-average molecular weight of the polyalkylene glycol is 400-20,000, (2) the amount of the polyalkylene glycol added is 3.0-15.0 wt.% in a ratio to the formed polyester, (3) the intrinsic viscosity [η] of the polyester is 0.65-0.85 (dl/g) and (4) the weight-average molecular weight (Mw) of the polyester is >=40,000, the Z-average molecular weight (Mx) is >=75,000 and polydispersity (Mz/Mw) is 1.90 and has 0.015-0.060 double refractive index.

    PARTIALLY HOLLOW POLYESTER YARN AND METHOD FOR PRODUCING THE SAME
    85.
    发明专利
    PARTIALLY HOLLOW POLYESTER YARN AND METHOD FOR PRODUCING THE SAME 失效

    公开(公告)号：JP2001207339A

    公开(公告)日：2001-08-03

    申请号：JP2000020005

    申请日：2000-01-28

    Applicant: TORAY INDUSTRIES

    Inventor： OCHI TAKASHI ,  KIDAI AKIRA ,  FUKUHARA MOTOTADA

    IPC: D02J1/22 ,  D01D5/24 ,  D01D5/34 ,  D01F8/10 ,  D01F8/14

    Abstract: PROBLEM TO BE SOLVED: To produce a partially hollow polyester yarn excellent in process passableness for forming a fabric capable of solving defects and excellent in touch feeling and fabric surface aesthetic properties and further excellent in lightweight and heat insulating properties and to provide a method for producing the partially hollow polyester yarn. SOLUTION: This partially hollow polyester yarn is characterized in that the yarn is a core-sheath conjugate yarn comprising (A) a polymer which is substantially a polyester and arranged in a sheath part and (B) a polymer having a greater temperature dependence of elongational viscosity than that of the polymer (A) and arranged in an amount of 1-15 wt.% based on the total weight of the core-sheath conjugate yarn in a core part, the polymer (B) arranged in the core part is cut to partially form hollow parts, the length of solid parts is 10-100 μm on the average, the length of the hollow parts is 5-100 μm on the average, the strength is >=3.0 cN/dtex and the elongation is 20-50%.

    SCREEN GAUZE
    86.
    发明专利
    SCREEN GAUZE 失效

    公开(公告)号：JP2001030646A

    公开(公告)日：2001-02-06

    申请号：JP20402199

    申请日：1999-07-19

    Applicant: TORAY INDUSTRIES

    Inventor： HIRAI SATOSHI ,  FUKUHARA MOTOTADA

    IPC: B41N1/24 ,  D01F8/14

    Abstract: PROBLEM TO BE SOLVED: To reduce a scum, to enhance a strength, modulus and mesh adapted to precise printing by using composite monofilaments each having a core of a polyethylene terephthalate and a sheath of a polypropylene terephthalate as at least warps. SOLUTION: This screen gauze is formed of a woven fabric using a core and sheath type composite monofilament having a polyester for forming a core formed from a polyethylene terephthalate and a polyester for forming a sheath from a polypropylene terephthalate as warps. According to this, no scum is brought about even under severe weaving conditions of the gauze by an operation of the polypropylene terephthalate, and a surface precipitation of an oligomer contained in the polymer can be suppressed through manufacturing steps and weaving finishing of the monofilaments. A high strength and a high elastic modulus can be performed by an operation of the polyethylene terephthalate.

    DIRECT SPINNING AND DRAWING OF POLYESTER YARN
    87.
    发明专利
    DIRECT SPINNING AND DRAWING OF POLYESTER YARN 失效

    公开(公告)号：JP2000144528A

    公开(公告)日：2000-05-26

    申请号：JP31812398

    申请日：1998-11-09

    Applicant: TORAY INDUSTRIES

    Inventor： MIZUHASHI MOTOI ,  YAMAMOTO NOBORU ,  FUKUHARA MOTOTADA

    IPC: D01F6/62 ,  D01D10/00 ,  D02J1/22

    Abstract: PROBLEM TO BE SOLVED: To provide a direct spinning and drawing method for multi-yarn of one side hanging, not causing dyeing speck. SOLUTION: A plurality of polyester fiber yarns extruded from a spinneret, cooled and solidified are taken off by a roller having >=1,500 m/minute and =4,000 m/minute speed. In this case, the yarns are hung on a take-off roller 6 having >=95 deg.C surface temperature by one side hanging of less than one round, a yarn heater 5 is installed before the take-off roller 6, the yarn is not drawn in the heater 5 and the yarn temperature just before the take-off roller 6 is set by the inequality Tg+10> the yarn temperature just before the take-off roller >=Tg-30 (Tg: the glass transition temperature ( deg.C) of the yarn) and the yarn is drawn.

    DIRECT SPIN DRAWING OF POLYESTER FIBER
    88.
    发明专利
    DIRECT SPIN DRAWING OF POLYESTER FIBER 失效

    公开(公告)号：JPH1112845A

    公开(公告)日：1999-01-19

    申请号：JP15656697

    申请日：1997-06-13

    Applicant: TORAY INDUSTRIES

    Inventor： MIZUHASHI MOTOI ,  SAIJO TERUAKI ,  FUKUHARA MOTOTADA

    IPC: D01F6/62 ,  D01D5/12 ,  D02J1/22

    Abstract: PROBLEM TO BE SOLVED: To carry out direct spinning and drawing of a polyester fiber and obtain the fiber excellent in quality without causing dyeing speck at a low cost by treating plural polyester fiber yarns, discharged from a spinneret, cooled and solidified under specific conditions. SOLUTION: The temperature in a yarn heating region and the passage time of yarns through a dry heat-treating device 6 are respectively regulated within the ranges of 300-1,000 deg.C and 0.01-0.035 sec to carry out the direct spinning and drawing of polyester fibers when introducing the plural polyester fiber yarns, discharged from a spinneret 1, cooled and solidified into the dry heat-treating device 6 installed between an unheated first roller 5 and an unheated roller 7, drawing the resultant yarns and then winding the yarns at >=4,000 m/min speed. The dry heat-treating device 6 preferably has plural heating regions for individually running the plural yarns and a part or all of the wall surfaces of the regions are preferably heated.

    PRODUCTION OF POLYPHENYLENE SULFIDE FIBER
    90.
    发明专利
    PRODUCTION OF POLYPHENYLENE SULFIDE FIBER 失效

    公开(公告)号：JPH1060734A

    公开(公告)日：1998-03-03

    申请号：JP21462396

    申请日：1996-08-14

    Applicant: TORAY INDUSTRIES

    Inventor： ARANISHI YOSHITAKA ,  TANIGUCHI MASAHARU ,  FUKUHARA MOTOTADA

    IPC: D01F1/10 ,  D01F6/74

    Abstract: PROBLEM TO BE SOLVED: To obtain a polyphenylene sulfide fiber capable of spinning for a long time without fiber braking and denier irregularities, excellent in heat resistance and chemical resistance and useful for filters by adding mix mixing a predetermined amount of an alkylenebis(alkanamide) with a polyphenylene sulfide and melting and spinning the mixture. SOLUTION: This polyphenylene sulfide fiber is obtained by adding 0.1-10 pts.wt. of an alkylenebis(alkanamide) such as ethylenebis(octadecanamide) to a polyphenylene sulfide, mixing, melting and spinning the mixture. The melt viscosity ηA of the polyphenylene sulfide added with the alkylenebis(alkanamide) at 290 deg.C and 1,000sec preferably satisfies the equations ηO×0.60 (7O is a melt viscosity of the corresponding polyphenylene sulfide at 290 deg.C and 1,000sec when the alkylenebis(alkanamide) is not added and mixed.).

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